Inorganic Monolayers Formed at Organic Templates

9530453塔勒姆这项建议概述了国家科学基金会先前的一项研究的继续，该研究旨在开发和表征使用朗缪尔-布洛杰特(LB)方法形成的新的有机/无机混合单层和多层薄膜材料。方法是将无机扩展晶格结构引入到有机单层组装中，从而在薄膜中引入许多无机晶格固有的结构特征和合作现象，同时保持有机组装提供的单层控制。分层固态结构将被使用，因为它们提供了最高的成功概率，因为无机晶格能量显然有利于形成层。具体地说，本研究包括三个方面的工作：1)扩展用于制备含扩展晶格无机网络的新型LB材料的协议。2)对新材料进行化学和结构表征，并说明结构差异。3)研究顺磁材料的磁性。几类有机/无机混合组装体最近受到了人们的关注，因为研究人员已经意识到，通过有机和无机网络的结合，大量的新的固态结构是可能的，通常具有可调的体积和界面性质。例如柱撑粘土、有机/无机层状固体、带有有机客体的沸石、在无机表面自组装的有机薄膜，以及在有机表面活性剂的帮助下形成的无机介观结构。除了这些类别的材料所具有的结构和化学多样性外，有机和无机成分组合成一个“双网络”组装打开了将通常只与一种或另一种材料相关的物理性能的复合体工程到一种材料中的可能性。潜在有趣的“双网络”材料的一个例子是将磁性无机晶格与导电有机网络相结合的材料。尽管有巨大的潜力，但对这些类型的材料的详细研究仍然相当年轻。这项拟议的研究解决了三个重要问题。是什么驱动了固态结构，以及如何控制它们？如果复合性能是可取的，那么如何实现这一点？如何调整网络的耦合以单独运行或协同运行？

9530453 Talham This proposal outlines a continuation of a prior NSF research for the development and characterization of new mixed organic/inorganic monolayer and multilayer thin film materials formed using Langmuir-Blodgett (LB) methods. The approach is to incorporate inorganic extended lattice structures into organic monolayer assemblies thereby introducing into the films structural features and cooperative phenomena which are inherent to many inorganic lattices, while at the same time maintaining the monolayer control afforded by the organic assembly. Layered solid- state structures will be used because they offer the highest probability of success as the inorganic lattice energy clearly favors forming layers. Specifically, the proposed research consists of three efforts: 1) To expand on the protocol developed for preparing new LB materials containing extended-lattice inorganic networks. 2) To chemically and structurally characterize new materials and account for structural differences. 3) To investigate the magnetic properties of paramagnetic materials. %%% Several classes of mixed organic/inorganic assemblies have received attention recently as researchers have realized that through the combination of organic and inorganic networks a vast array of new solid-state structures is possible often with tunable bulk and interfacial properties. Examples include pillared clays, organic/inorganic layered solids, zeolites with organic guests, self-assembled organic films at inorganic surfaces, and inorganic mesostructures formed with the aid of organic surfactants. In addition to the structural and chemical diversity that these classes of materials promise, the combination of organic and inorganic components into a "dual-network" assembly opens the possibility of engineering into one material a composite of physical properties that are normally only associated with one type of material or the other. An example of a potentially interesting "dualnetwork" material would be one that combines a magnetic inorganic lattice with a conducting organic network. Despite the tremendous potential, detailed studies of these types of materials are still quite young. The proposed research addresses three important questions. What drives the solid-state structures and how can they be controlled? If composite properties are desirable, how can this be achieved? How can coupling of the networks be tuned to behave separately or in synergy?